#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>

#define PORT 9090
#define BUFFER_SIZE 1024

int main() {
    int server_fd, new_socket;
    struct sockaddr_in address;
    char buffer[BUFFER_SIZE] = {0};
    int addrlen = sizeof(address);

    server_fd = socket(AF_INET, SOCK_STREAM, 0);
    if (server_fd == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    printf("Server listening on port %d...\n", PORT);

    new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen);
    if (new_socket < 0) {
        perror("accept");
        exit(EXIT_FAILURE);
    }

    read(new_socket, buffer, BUFFER_SIZE);
    printf("Server received: %s\n", buffer);

    // Sending response
    char *msg = "Hello from server";
    send(new_socket, msg, strlen(msg), 0);
    printf("Server sent response\n");

    // Sleep a bit to help capture linger behavior
    sleep(5);

    close(new_socket);
    close(server_fd);
    return 0;
}